@Cliff-Karlsson
I suppose setting Pin 4 to INPUT after running a wire from Pin 4 to Pin 2 would patch it. Or you could solder bridge between 2 and 3, and then solder bridge again between 3 and 4. In that case, you'd set both Pin 3 and Pin 4 to input, assuming they weren't being used for something else.

If you have the boards but haven't yet soldered the headers, then I suggest doing the solder bridges, but don't connect header pins to pins 3 and 4. Then there's no need to set pins 3 and 4 to INPUT. I think that would be the cleanest fix.

That said, if the firmware you're running isn't relying on interrupts, then no patch would be needed. For instance, I had previously tested the PCB using lowpowerlab's node and gateway example code, which doesn't use interrupts for send and receive. That's why I didn't notice the bug until it was pointed out by Korttoma.

@andre_x it is pretty straightforward, there are already examples rfm69 examples around the forum: it's basically the node example sketch with added sensor library and a few lines of code to read and send temperature/humidity